Blow molding machine main drive

Abstract

The utility model discloses a kind of blow molding machine main transmission devices, including base, box, gear, transmission shaft, from synchronous wheel, mechanical hand main synchronous wheel, mounting pallet and locating plate, base is set on rack, box is set on base, transmission shaft passes through base and box, the lower end of transmission shaft is provided with from synchronous wheel, its upper end is provided with mechanical hand main synchronous wheel, gear is set in box interior and is set on transmission shaft, mounting pallet is set on rack, locating plate is set on mounting pallet and is fixedly connected with the flange of box, the side of locating plate towards box is equipped with locating part. By the independent support frame of mounting pallet and locating plate, double positioning and reinforcement are provided for the box. The structure greatly enhances the torsional and anti-overturning capacity of the whole device, effectively suppresses the displacement and vibration that the box may occur under high-speed start-stop and mold opening and closing impact, provides a fundamental guarantee for the accurate parking of the bottle embryo between stations, and significantly improves the bottle forming quality.

Description

Technical Field

[0001] This utility model relates to the technical field of fully automatic rotary blow molding machines, and specifically to a main drive device for a blow molding machine. Background Technology

[0002] Fully automatic rotary blow molding machines are the core equipment in PET bottle production. Their working principle involves continuously rotating the preform at multiple stations to sequentially complete heating, blow molding, and forming processes. The main drive unit on the blow molding machine, as the heart of the entire rotating system, directly determines the equipment's production efficiency, bottle quality, and operational stability. Traditionally, the main drive unit used in blow molding machines typically employs a structure consisting of a base, housing, drive shaft, and synchronous pulleys, with the housing fixed to the frame via the base.

[0003] However, under such demanding conditions of high speed, continuous operation, and periodically changing loads, the shortcomings of traditional structures are magnified dramatically. First, the enormous inertia of the rotating system and the impact load generated by the mold opening and closing place extremely high demands on the rigidity of the transmission system. Traditional housings have only a single support point and insufficient rigidity, easily leading to micrometer-level displacement or circumferential twisting of the housing relative to the frame. This minute change is transmitted to the entire rotating system, causing a decrease in preform positioning accuracy, resulting in quality problems such as uneven bottle wall thickness and deformed bottle neck threads during the blowing process, leading to a persistently high scrap rate. Second, continuous vibration accelerates the fatigue loosening of connecting bolts, creating a vicious cycle that not only affects transmission accuracy but may also cause equipment downtime and increase maintenance costs.

[0004] Therefore, developing a blow molding machine main drive that can withstand high-intensity impact loads, has extremely high rigidity and positioning accuracy, and can be quickly maintained has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the main drive device of the blow molding machine in the prior art, such as poor rigidity, easy vibration, inaccurate positioning and inconvenient maintenance, and to provide a blow molding machine main drive device with a robust structure, strong impact resistance and accurate positioning.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A blow molding machine main drive device includes a base, a housing, gears, a drive shaft, a driven synchronous pulley, a robot arm main synchronous pulley, a mounting plate, and a positioning plate. The base is mounted on a machine frame, the housing is mounted on the base, the drive shaft passes through the base and the housing, the driven synchronous pulley is located at the lower end of the drive shaft, and the robot arm main synchronous pulley is located at the upper end of the drive shaft. The gear is located inside the housing and sleeved on the drive shaft. The mounting plate is mounted on the machine frame, and the positioning plate is mounted on the mounting plate and fixedly connected to the flange of the housing. The positioning plate has a positioning part for positioning the housing on the side facing the housing.

[0007] Furthermore, the mounting trays are symmetrically arranged on the outside of the box, and the bottom of the positioning plate is provided with a groove, through which the positioning plate is mounted on the mounting tray.

[0008] Furthermore, the housing includes an integrally formed cylindrical body and a flange, the cylindrical body being disposed on the flange, and the housing being mounted on the frame via the flange.

[0009] Furthermore, the cylinder body is adapted to the positioning part.

[0010] Furthermore, the cylindrical body has an opening structure on its circumferential side for exposing gears.

[0011] Furthermore, an end cap is provided inside the upper end of the main synchronous wheel of the robotic arm.

[0012] Furthermore, a connecting body is provided on the upper end face of the drive shaft, the lower end of the connecting body is connected to the drive shaft, and its upper end passes through the end cover. The connecting body is provided with a connecting through hole.

[0013] Furthermore, the groove portion is a rectangular groove.

[0014] Compared with existing technologies, the technical solution of this patent achieves the following beneficial effects: 1. To address the significant inertial impact of the blow molding machine's rotating system, an independent support frame consisting of mounting plates and positioning plates provides dual positioning and reinforcement for the housing. This structure greatly enhances the entire device's resistance to torsion and tipping, effectively suppressing potential displacement and vibration of the housing under high-speed start-up and shutdown and mold opening and closing impacts. This provides a fundamental guarantee for the precise positioning of preforms between each station, thereby significantly improving bottle molding quality and reducing the scrap rate.

[0015] 2. The positioning part on the positioning plate fits tightly with the side of the housing, achieving precise radial positioning of the housing in the horizontal direction. This effectively prevents circumferential displacement of the housing under periodic loads and ensures the angular synchronization accuracy of the drive shaft and synchronous pulley.

[0016] 3. The symmetrically arranged mounting plates and positioning plates ensure that the supporting force on the housing is evenly and symmetrically distributed, perfectly balancing the centrifugal force and off-center load torque generated by the rotating system. The structural stability far exceeds that of traditional single-point support, effectively extending the service life of the equipment. Attached Figure Description

[0017] Figure 1 The figure shown is a three-dimensional structural schematic diagram of the main drive device of the blow molding machine of this utility model; Figure 2 The figure shown is a three-dimensional structural schematic diagram of the main drive device of the blow molding machine of this utility model; Figure 3 The diagram shown is a top view of the main drive device of the blow molding machine according to this utility model. Figure 4 The diagram shown is a cross-sectional view of the main drive device of the blow molding machine of this utility model.

[0018] In the diagram: 1. Base; 2. Box body; 21. Cylinder body; 22. Flange; 23. Opening structure; 3. Gear; 4. Drive shaft; 5. Driven synchronous pulley; 6. Main synchronous pulley of the robot arm; 7. Mounting plate; 8. Positioning plate; 81. Groove; 82. Positioning part; 9. End cap; 10. Connector; 100. Connecting through hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] See Figure 1-4As shown, this embodiment provides a main drive device for a blow molding machine, including a base 1, a housing 2, a gear 3, a drive shaft 4, a driven synchronous pulley 5, a robotic arm main synchronous pulley 6, a mounting plate 7, and a positioning plate 8. The base 1 is mounted on a frame (not shown in the figure), and the housing 2 is mounted on the base 1. The drive shaft 4 passes through the base 1 and the housing 2. The lower end of the drive shaft 4 is equipped with the driven synchronous pulley 5, which receives power input from the main motor of the blow molding machine. The upper end of the drive shaft 4 is equipped with the robotic arm main synchronous pulley 6, which drives the entire rotating mold frame system via a synchronous belt. The gear 3 is located inside the housing 2 and sleeved on the drive shaft 4. The mounting plate 7 is mounted on the frame, and the positioning plate 8 is mounted on the mounting plate 7 and fixedly connected to the flange 22 of the housing 2. The positioning plate 8 has a positioning part 82 on the side facing the housing 2 for positioning the housing 2. This solves the problems of inaccurate installation and positioning, poor rigidity, and easy displacement or vibration under load in traditional blow molding machine drive devices, which affect transmission accuracy and stability. The mounting plate 7 and positioning plate 8, forming a support frame independent of the base, provide dual positioning and reinforcement for the housing 2. The mounting plate 7 provides a stable frame connection point, while the positioning plate 8 directly connects the housing flange 22 to the frame, greatly enhancing the torsional and overturning resistance of the entire device. The positioning part 82 on the positioning plate 8 cooperates with the side of the housing 2, achieving precise radial positioning of the housing 2 in the horizontal direction, effectively preventing circumferential displacement or rotation of the housing 2 during operation.

[0021] The mounting plates 7 are symmetrically arranged on the outer side of the housing 2, and the positioning plate 8 has a groove 81 at its bottom, through which the positioning plate 8 is mounted on the mounting plate 7. The symmetrical arrangement of the mounting plates 7 and the positioning plate 8 ensures a uniform and symmetrical distribution of the supporting force on the housing 2, eliminating the additional torque caused by eccentric loading, further enhancing the rigidity and stability of the structure, and reducing vibration and noise. The groove 81 is a rectangular groove, and its engagement with the mounting plate 7 forms a non-slip mechanical interlocking structure. This connection method is not only convenient to install, but more importantly, it effectively resists shear forces from all directions, ensuring the long-term stability of the positioning support structure.

[0022] The housing 2 comprises an integrally formed cylindrical body 21 and a flange 22. The cylindrical body 21 is mounted on the flange 22, and the housing 2 is mounted on the frame via the flange 22. The positioning part 82 has an arc-shaped structure that fits the cylindrical body 21. The integral molding of the cylindrical body 21 and flange 22 of the housing 2 fundamentally avoids the loosening problems that may occur with the connecting bolts of the split structure and eliminates the form and position errors of the joint surfaces of the split structure. Clearly distinguishing the housing 2 into the cylindrical body 21 and the flange 22 achieves functional separation. The flange 22 is responsible for load-bearing and installation connection, while the cylindrical body 21 is responsible for accommodating gears. The flange 22 provides a flat and reliable mounting surface for the connection between the housing 2 and the base 1 and the positioning plate 8, simplifying the assembly process. The fit between the cylindrical body 21 and the positioning part 82 achieves surface contact positioning, which, compared to point or line contact, has a larger contact area, more uniform force distribution, and higher positioning rigidity and accuracy.

[0023] The cylinder body 21 has an opening structure 23 on its circumferential side for exposing the gear 3. This opening structure 23 on the cylinder body 21 provides a window for inspection and maintenance without disassembling the housing. This greatly simplifies daily maintenance and troubleshooting processes, reduces maintenance costs and time, and ensures the continuity and high efficiency of blow molding machine production.

[0024] An end cover 9 is installed inside the upper end of the main synchronous pulley 6 of the robot arm. The end cover 9 inside the upper end of the main synchronous pulley 6 of the robot arm provides an effective sealing protection for the key part of the upper end of the transmission shaft 4, preventing contaminants from entering and improving the reliability and service life of the transmission system.

[0025] A connector 10 is provided on the upper end face of the drive shaft 4. The lower end of the connector 10 is connected to the drive shaft 4, and its upper end lifting ring penetrates the end cap 9. The connector 10, with its lower connecting function and upper connecting through hole 100, forms a standardized functional interface integrated into the drive shaft body. The connecting through hole 100 can be used to connect other functional components, such as encoders or auxiliary transmission mechanisms, greatly expanding the functional versatility and expandability of the main drive unit, and meeting the upgrade requirements of intelligent and high-safety blow molding machines.

[0026] The working principle of the main drive device of this blow molding machine is as follows: The main motor of the blow molding machine drives the synchronous pulley 5 via a synchronous belt, which in turn drives the transmission shaft 4 and gear 3 to rotate at high speed. This power is ultimately transmitted to the main synchronous pulley 6 of the robotic arm, driving the entire rotating mold frame to perform intermittent rotational motion. During this period, the enormous starting and stopping inertial force of the rotating system and the impact load from the mold opening and closing act on the housing 2 through the transmission shaft. This invention effectively disperses and transmits these forces to the robust frame through a reinforced frame composed of symmetrical positioning plates 8 on both sides and mounting plates 7. The positioning part 82 of the positioning plate 8 tightly holds the cylinder body 21 of the housing 2, providing precise radial positioning and resisting circumferential torque; simultaneously, the fitting structure of the groove part 81 and the mounting plate 7 resists lateral shear force. This multi-constraint mechanism ensures that the transmission system maintains extremely high rigidity and positioning accuracy even under the harsh working conditions of the blow molding machine, thereby guaranteeing the continuous production of high-quality bottles.

Claims

1. A main drive device for a blow molding machine, comprising a base (1), a housing (2), a gear (3), a drive shaft (4), a driven synchronous pulley (5), a robot arm main synchronous pulley (6), a mounting plate (7), and a positioning plate (8), characterized in that, The base (1) is mounted on the frame, the housing (2) is mounted on the base (1), the drive shaft (4) passes through the base (1) and the housing (2), the lower end of the drive shaft (4) is provided with a synchronous pulley (5), and the upper end of the drive shaft (4) is provided with a main synchronous pulley (6) for the robot arm, the gear (3) is mounted inside the housing (2) and sleeved on the drive shaft (4), the mounting plate (7) is mounted on the frame, the positioning plate (8) is mounted on the mounting plate (7) and fixedly connected to the flange (22) of the housing (2), and the positioning plate (8) has a positioning part (82) for positioning the housing (2) on the side facing the housing (2).

2. The main drive device of the blow molding machine according to claim 1, characterized in that, The mounting tray (7) is symmetrically arranged on the outside of the box (2), and the bottom of the positioning plate (8) is provided with a groove (81). The positioning plate (8) is arranged on the mounting tray (7) through the groove (81).

3. The main drive device of the blow molding machine according to claim 1, characterized in that, The housing (2) includes an integrally formed cylindrical body (21) and a flange (22). The cylindrical body (21) is disposed on the flange (22), and the housing (2) is disposed on the frame through the flange (22).

4. The main drive device for a blow molding machine according to claim 3, characterized in that, The cylindrical body (21) is adapted to the positioning part (82).

5. The main drive device for a blow molding machine according to claim 3, characterized in that, The cylindrical body (21) has an opening structure (23) on its circumferential side for exposing the gear (3).

6. The main drive device of the blow molding machine according to claim 1, characterized in that, An end cap (9) is provided inside the upper end of the main synchronous wheel (6) of the robotic arm.

7. The main drive device for a blow molding machine according to claim 6, characterized in that, The upper end face of the drive shaft (4) is provided with a connector (10), the lower end of the connector (10) is connected to the drive shaft (4), and its upper end passes through the end cover (9). The connector (10) is provided with a connecting through hole (100).

8. The main drive device for a blow molding machine according to claim 2, characterized in that, The groove (81) is a rectangular groove.

Images